JRA55

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User Guide
Download location: NCAR monthly mean
List of variable names and numbers (This link is for 3 and 6-hourly data, but has the same variable name:number pair for reference)

Download procedure:

• Globus file transfer

  • Collection: NCAR RDA Dataset Archive

  • Path: /ds628.1/

• Files downloaded as GRIB, convert to NetCDF (how to; simplest approach is using cdo)

  • Shell script to perform conversion for all files (example available here)

• Grid variables (e.g. cell area) are apparently not available from the NCAR website. The input4MIPs website has areacella for the JRA55-do data product (search ‘JRA55’ in the search bar). I think this is the same grid as for the atmospheric reanalysis data.

  • Command to retrieve this file:

  • wget https://esgf-data2.llnl.gov/thredds/fileServer/user_pub_work/input4MIPs/CMIP6/OMIP/MRI/MRI-JRA55-do-1-5-0/atmos/fx/areacella/gr/v20200916/areacella_input4MIPs_atmosphericState_OMIP_MRI-JRA55-do-1-5-0_gr.nc

• NOTE: variables downloaded from the NCAR Archive have their latitude coordinate reversed; that is, going from north to south. This is different to the grid data downloaded from input4MIPs. This can be remedied in loading the data using xarray’s .sort on the latitude dimension.

An alternative download strategy using wget is documented here. Note that this is for 3 and 6-hourly data.